tests/SDL/symbolstest.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2010 Jiri "BlueBear" Dluhos                            *
  20  *                         <jiri.bluebear.dluhos@gmail.com>                  *
  21  *                                                                           *
  22  * Copyright (C) 2009-2011 Cyril Hrubis <metan@ucw.cz>                       *
  23  *                                                                           *
  24  *****************************************************************************/
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <SDL/SDL.h>
  29
  30 #include "GP_SDL.h"
  31
  32 static GP_Pixel black;
  33
  34 /* The surface used as a display (in fact it is a software surface). */
  35 SDL_Surface *display = NULL;
  36 GP_Context context;
  37
  38 /* Timer used for refreshing the display */
  39 SDL_TimerID timer;
  40
  41 /* An event used for signaling that the timer was triggered. */
  42 SDL_UserEvent timer_event;
  43
  44 static int pause_flag = 0;
  45
  46 static int fill_flag = 0;
  47
  48 Uint32 timer_callback(__attribute__((unused)) Uint32 interval,
  49                         __attribute__((unused)) void *param)
  50 {
  51         timer_event.type = SDL_USEREVENT;
  52         SDL_PushEvent((SDL_Event *) &timer_event);
  53         return 60;
  54 }
  55
  56 void random_point(SDL_Surface *surf, int *x, int *y)
  57 {
  58         *x = random() % surf->w;
  59         *y = random() % surf->h;
  60 }
  61
  62 void draw_random_symbol(GP_Pixel pixel)
  63 {
  64         int x, y, w, h;
  65         random_point(display, &x, &y);
  66
  67         w = (random() % 10) + 5;
  68         h = (random() % 10) + 5;
  69
  70         if (fill_flag)
  71                 GP_FillSymbol(&context, random() % GP_SYM_MAX, x, y, w, h,
  72                               pixel);
  73         else
  74                 GP_Symbol(&context, random() % GP_SYM_MAX, x, y, w, h,
  75                           pixel);
  76 }
  77
  78 void clear_screen(void)
  79 {
  80         SDL_LockSurface(display);
  81         GP_Fill(&context, black);
  82         SDL_UnlockSurface(display);
  83 }
  84
  85 void redraw_screen(void)
  86 {
  87         if (pause_flag)
  88                 return;
  89
  90         SDL_LockSurface(display);
  91
  92         GP_Pixel pixel;
  93         pixel = GP_RGBToPixel(random() % 256, random() % 256,
  94                               random() % 256, context.pixel_type);
  95
  96         draw_random_symbol(pixel);
  97
  98         SDL_UnlockSurface(display);
  99 }
 100
 101 void event_loop(void)
 102 {
 103         SDL_Event event;
 104
 105         while (SDL_WaitEvent(&event) > 0) {
 106
 107                 switch (event.type) {
 108
 109                 case SDL_USEREVENT:
 110                         redraw_screen();
 111                         SDL_Flip(display);
 112                         break;
 113
 114                 case SDL_KEYDOWN:
 115                         switch (event.key.keysym.sym) {
 116                         case SDLK_SPACE:
 117                                 fill_flag = !fill_flag;
 118                                 clear_screen();
 119                         break;
 120                         case SDLK_p:
 121                                 pause_flag = !pause_flag;
 122                         break;
 123                         case SDLK_ESCAPE:
 124                                 return;
 125
 126                         default:
 127                                 break;
 128                         }
 129                         break;
 130                 case SDL_QUIT:
 131                         return;
 132                 default:
 133                         break;
 134                 }
 135         }
 136 }
 137
 138 int main(int argc, char *argv[])
 139 {
 140         /* Bits per pixel to be set for the display surface. */
 141         int display_bpp = 0;
 142
 143         int i;
 144         for (i = 1; i < argc; i++) {
 145                 if (strcmp(argv[i], "-16") == 0) {
 146                         display_bpp = 16;
 147                 }
 148                 else if (strcmp(argv[i], "-24") == 0) {
 149                         display_bpp = 24;
 150                 }
 151                 else if (strcmp(argv[i], "-32") == 0) {
 152                         display_bpp = 32;
 153                 }
 154         }
 155
 156         /* Initialize SDL */
 157         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) {
 158                 fprintf(stderr, "Could not initialize SDL: %s\n", SDL_GetError());
 159                 return 1;
 160         }
 161
 162         /* Create a window with a software back surface */
 163         display = SDL_SetVideoMode(640, 480, display_bpp, SDL_SWSURFACE);
 164         if (display == NULL) {
 165                 fprintf(stderr, "Could not open display: %s\n", SDL_GetError());
 166                 goto fail;
 167         }
 168
 169         /* Set up a clipping rectangle to test proper clipping of pixels */
 170         SDL_Rect clip_rect = {10, 10, 620, 460};
 171         SDL_SetClipRect(display, &clip_rect);
 172
 173         GP_SDL_ContextFromSurface(&context, display);
 174
 175         black = GP_ColorToContextPixel(GP_COL_BLACK, &context);
 176
 177         /* Set up the refresh timer */
 178         timer = SDL_AddTimer(60, timer_callback, NULL);
 179         if (timer == 0) {
 180                 fprintf(stderr, "Could not set up timer: %s\n", SDL_GetError());
 181                 goto fail;
 182         }
 183
 184         /* Enter the event loop */
 185         event_loop();
 186
 187         /* We're done */
 188         SDL_Quit();
 189         return 0;
 190
 191 fail:
 192         SDL_Quit();
 193         return 1;
 194 }
 195